up.fragment up.fragment.onKept(element, callback)
JavaScript function

This feature is experimental. Please share your experiences so we know what to keep or change.

Runs a callback when the given element or its ancestors in the same layer were kept.

Parameters

element

required

The element to observe with its ancestors in the same layer.

Type: Element

callback

required

The callback to run.

It will be called with an up:fragment:kept argument.

Type: Function(event)

A function that unsubscribes the callback.

When the element is destroyed, the callback will be unsubscribed automatically.

Type: Function